Lead frame testing equipment

Abstract

The present invention discloses a lead frame inspection device, comprising a feed conveyor guide rail, a frame, a conveying mechanism, a defect detection device, and a discharge guide rail. The conveying width of the feed conveyor guide rail is adjustable. The feed conveyor guide rail comprises a feed conveyor mechanism and at least one feed guide rail group. The length and width of the guide space of the feed guide rail group are adjustable. During inspection, the workpiece reaches the feed conveyor mechanism through the feed guide rail group and enters the conveying mechanism under the transmission of the feed conveyor mechanism. The defect detection device performs defect detection on the workpiece when the conveying mechanism transmits the workpiece, and the discharge guide rail outputs qualified workpieces. The present application can be applied to the input of workpieces of different sizes and specifications, greatly improving the versatility of the equipment. The workpiece can be accurately input into the feed conveyor mechanism through the feed guide rail group, which can ensure the accuracy of the detection position, effectively improve the detection efficiency, reduce the investment of labor costs, and have high detection accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of lead frame surface defect detection, and in particular to a lead frame detection device. Background Art

[0002] The leadframe is the chip carrier for integrated circuits. It's a key component that uses bonding materials to electrically connect the chip's internal circuit terminals to the external leads, forming the electrical circuit. It serves as a bridge between the integrated circuit and external wiring, making it a crucial component in the industry. Therefore, leadframes must not exhibit defects such as missing material, weld marks, breakage, shrinkage, deformation, burns, and scratches, as these defects can affect their quality and service life. Currently, leadframes are inspected before shipment. They are transported via a conveyor belt to an inspection station, where a defect detection device inspects the leadframes for surface defects. Defective leadframes are removed, and qualified leadframes are removed, significantly improving the leadframe delivery yield. However, conventional leadframe defect detection equipment is limited in versatility. Typically, a single unit is only suitable for one leadframe size. Leadframe manufacturers frequently adjust the size of their leadframes based on the products they are intended for. Consequently, they often need to purchase multiple sizes of testing equipment, significantly increasing inspection costs. Summary of the Invention

[0003] In view of the problems existing in the above-mentioned prior art, the present invention provides a lead frame detection device, which can improve the versatility of detection, meet the detection needs of lead frames of different sizes and specifications, and is simple to operate and highly efficient, and can meet the actual requirements of modern industrial production.

[0004] In order to achieve the above-mentioned purpose, the invention adopts the following technical measures:

[0005] A lead frame inspection device includes a feed conveyor guide rail, a frame, a conveying mechanism, a defect detection device and a discharge guide rail. The conveying width of the feed conveyor guide rail is adjustable. The feed conveyor guide rail includes a feed conveyor mechanism and at least one group of feed guide rail groups. The length and width of the guide space of the feed guide rail group are adjustable. During inspection, the workpiece passes through the feed guide rail group to reach the feed conveyor mechanism, and enters the conveying mechanism under the conveyance of the feed conveyor mechanism. The defect detection device performs defect detection on the workpiece when the conveying mechanism conveys the workpiece, and the discharge guide rail outputs qualified workpieces.

[0006] Preferably, the feed conveying mechanism includes two symmetrically arranged limit plates, and a conveyor belt mechanism is installed on opposite sides of the two limit plates. The bottom of each limit plate is connected to a linear module perpendicular to the conveying direction.

[0007] Preferably, the two limit plates are connected to the first adjusting screw, and when the first adjusting screw is rotated, the two limit plates move relatively closer to or relatively farther away from each other along the linear direction of the linear module.

[0008] Preferably, the feed guide rail group includes a first limit guide rail and a second limit guide rail, and the first limit guide rail and the second limit guide rail are respectively connected to both sides of the feed conveying mechanism. The material guide space is formed between the first limit guide rail and the second limit guide rail, and the width of the material guide space is adjusted synchronously with the conveying width of the feed conveying mechanism.

[0009] Preferably, an adjustment mechanism for adjusting the length of the material guiding space is provided on one side of the feed guide rail group, and the adjustment mechanism includes a linear slide rail perpendicular to the conveying direction, and two sliders are slidably connected to the linear slide rail. The first limiting guide rail and the second limiting guide rail close to the adjustment mechanism are respectively slidably connected to the linear slide rail through sliders.

[0010] Preferably, the adjustment mechanism includes a connecting plate connected to the linear slide rail, the two ends of the connecting plate are respectively connected to the support frame through connecting rods, the connecting rods are threadedly connected to the connecting plate, first pulleys are installed on the two connecting rods, and a belt is wound between the two first pulleys, and one of the connecting rods is connected to a driving handwheel.

[0011] Preferably, the conveying mechanism includes a first conveyor belt mechanism and a detection station, and front end guide plates are symmetrically provided on both sides of the feed end of the first conveyor belt mechanism, and the distance between the two front end guide plates and the width of the detection station are synchronously adjusted by a width adjustment mechanism.

[0012] Preferably, the width adjustment mechanism includes a first screw slide module, two slides are movably mounted on the first screw slide module, the two front end guide plates are respectively connected to the slides, the two ends of the screw of the first screw slide module are respectively connected to the second screw slide module through a transmission mechanism, the two second screw slide modules are connected on both sides of the detection station, a light-transmitting plate is provided in the detection station, both sides of the light-transmitting plate are movably connected to the limiting connecting seats, the two limiting connecting seats are respectively connected to the slides of the two second screw slide modules, when the first screw slide module drives the front end guide plate to move, the second screw slide module is driven synchronously by the transmission mechanism, so that the distance between the two limiting connecting seats is reduced or increased.

[0013] Preferably, the transmission mechanism includes a rotating shaft installed on the first conveyor belt mechanism, and the two ends of the rotating shaft are connected to the two ends of the screw of the first screw slide module through a belt transmission mechanism or a chain transmission mechanism, and the two ends of the rotating shaft are connected to the two ends of the screw of the second screw slide module through a belt transmission mechanism or a chain transmission mechanism.

[0014] Preferably, rotating blocks are hinged on both sides of the first conveyor belt mechanism, the rotating blocks are connected to mounting shafts, and the ends of the mounting shafts are connected to tensioning wheels for tensioning the belt drive mechanism or the chain drive mechanism.

[0015] Preferably, the limiting connecting seat includes a support seat connected to the slide of the second screw slide module, and the support seat is connected to a clamping plate for clamping the end of the light-transmitting plate, and the end of the light-transmitting plate is inserted between the clamping plate and the slide of the second screw slide module.

[0016] Preferably, the discharge guide rail includes a discharge conveying mechanism with adjustable width and a lifting bracket arranged at the output end of the discharge conveying mechanism. The lifting bracket passes through the output conveying mechanism. The workpiece is output by the discharge conveying mechanism and stacked on the lifting bracket. The lifting bracket is used to transfer the stacked workpieces to the output conveying mechanism.

[0017] Preferably, a photoelectric sensor is provided below the feed guide rail group, and at least one of the feed conveyor guide rail, the conveying mechanism, and the discharge guide rail is provided with a material sensor.

[0018] Preferably, a telescopic blocking mechanism is provided on at least one side of the feed guide rail group, the telescopic blocking mechanism includes a telescopic member, the telescopic member is connected to a blocking piece, and the telescopic blocking mechanism is used to control the workpiece to enter the feed guide rail group.

[0019] Preferably, the workpiece is one or more of the following: a lead frame, a circuit board, a control core board, a display screen, and a lens.

[0020] Preferably, it also includes a paper separation mechanism, which includes a paper roll supply shaft and a paper supply rack. A traction roller group for the passage of the separation paper is provided on one side of the paper roll supply shaft, and a tensioning roller shaft for tensioning the separation paper is provided between the traction roller group and the paper roll supply shaft. The traction roller group and the tensioning roller shaft are installed on a base, and the base is installed on the paper supply rack through a movable mechanism. A paper outlet slot is provided on one side of the traction roller group, and a retractable cutter is provided on one side of the paper outlet slot. The retractable cutter is used to cut the separation paper.

[0021] The beneficial effects of the invention are:

[0022] 1. Compared with the prior art, the feed conveyor rail of the lead frame inspection equipment of the present application has an adjustable conveying width, and the length and width of the guide space of the feed guide rail group are adjustable, which can be suitable for the input of workpieces of different sizes and specifications, greatly improving the versatility of the equipment. The workpiece can be accurately input into the feed conveyor mechanism through the feed guide rail group, which can ensure the accuracy of the inspection position.

[0023] 2. Compared with the existing technology, the width of the guide space of the feed guide rail group of the lead frame inspection equipment of the present application is adjusted synchronously with the width of the feed conveying mechanism, and the distance between the two front end guide plates and the width of the inspection station are adjusted synchronously, which can improve the accuracy of the transmission space adjustment, reduce the tedious steps of multiple adjustments, greatly improve the working efficiency, and meet the actual requirements of modern industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional structural diagram of a lead frame detection device of the present invention;

[0025] Figure 2 This is a structural diagram of a feed conveyor rail of a lead frame inspection device according to the present invention;

[0026] Figure 3 This is a structural diagram of a conveying mechanism of a lead frame inspection device according to the present invention;

[0027] Figure 4 This is a structural diagram of a detection station of a lead frame detection device of the present invention;

[0028] Figure 5 This is a structural diagram of a discharge guide rail of a lead frame detection device according to the present invention;

[0029] Figure 6 This is a structural diagram of a paper separation mechanism of a lead frame detection device of the present invention. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] like Figures 1-6As shown, a lead frame detection equipment includes a feed conveying guide rail 1, a frame 2, a conveying mechanism 3, a defect detection device 4 and a discharging guide rail 5. The conveying mechanism 3 is arranged between the feed conveying guide rail 1 and the discharging guide rail 5, and the output mechanism 3 passes through the defect detection device 4. The conveying width of the feed conveying guide rail 1 is adjustable. The feed conveying guide rail 1 includes a feed conveying mechanism 11 and a feed guide rail group 12 vertically connected to the upper end of the feed conveying mechanism 11. The length and width of the guide space of the feed guide rail group 12 are adjustable, and the width of the guide space of the feed guide rail group 12 is synchronously adjusted with the width adjustment of the feed conveying mechanism 11. During detection, the workpiece of the telescopic blocking mechanism 13 passes through the feed guide rail group 12 to reach the feed conveying mechanism 11, and enters the conveying mechanism 3 under the conveyance of the feed conveying mechanism 11. The defect detection device 4 performs defect detection on the workpiece when the conveying mechanism 3 conveys the workpiece, and the discharging guide rail 5 outputs qualified workpieces.

[0032] The feed conveyor guide rail 1 and the discharge guide rail 5 are respectively installed on the frame 2. The defect detection device 4 can select the detection machine disclosed in patents CN202021766399.1, CN202120262580.7, CN202021767476.5, and CN202021738618.5, or other types of detection equipment can be selected without specific limitation. In this embodiment, the defect detection device 4 preferably uses the detection machine disclosed in patent application number CN202120262580.7. Therefore, an automatic rejection device can be provided between the discharge guide rail 5 and the conveying mechanism 3. The automatic rejection device has been disclosed in patent CN202120262580.7 and will not be further described.

[0033] Preferably, to enhance workpiece inspection and improve inspection accuracy, the flaw detection device 4 employs dual-light source inspection. Specifically, the flaw detection device 4 includes two CCD detection devices, one of which utilizes blue light and the other utilizes white light. The workpiece is first inspected using the CCD detection device utilizing white light, and then a secondary inspection is performed using the CCD detection device utilizing blue light. The structure of the CCD detection device has been disclosed in the aforementioned patent application and will not be described in detail here.

[0034] In detail, the feed conveyor mechanism 11 includes two symmetrically arranged limit plates 111, and a conveyor belt mechanism 112 is installed on the opposite sides of the two limit plates 111. The bottom of each limit plate 111 is connected to a linear module 113 perpendicular to the transmission direction of the conveyor belt mechanism 112. Therefore, the limit plates 111 can move back and forth along the linear direction of the linear module 113, and then the distance between the two limit plates 111 can be adjusted to meet the needs of conveying workpieces of different widths. In addition, the two limit plates 111 are connected to a first adjustment screw 114, and the first adjustment screw 114 can also be connected to a rotating handwheel, a drive motor or a drive mechanism for driving its rotation. The drive mechanism is not limited to a gear mechanism, a belt drive mechanism, a chain drive mechanism or a worm gear mechanism. Under the rotation of the first adjustment screw 114, the two limit plates 111 move relatively close to or relatively away from each other along the linear direction of the linear module 113.

[0035] In this embodiment, the linear modules 113 are provided in two groups, respectively connected to the two sides of the bottom of the two limit plates 111. In order to improve the distance adjustment accuracy of the two parallel limit plates 111 and prevent the limit plates 111 from tilting, a connecting slide 115 can be connected between the two limit plates 111. The connecting slide 115 is parallel to the linear module 113, and the two limit plates 111 can slide along the rod of the connecting slide 115. In order to ensure the balance of the limit plates 111, at least two connecting slides 115 are provided, and at least two connecting slides 115 are respectively installed in parallel on both sides of the limit plates 111. In addition, the first adjustment screw rods 114 can be provided with one, two, three or even more, preferably two, and the first adjustment screw rods 114 are parallel to each other and are connected and driven by a belt transmission mechanism or a chain transmission mechanism.

[0036] According to the control method of the movement of the two limit plates 111, the linear module 113 can select a ball screw type linear module, a linear slide mechanism, or a synchronous belt type linear module. In the present application, the distance between the two limit plates 111 is adjusted by the first adjusting screw 114, so the linear module is preferably a linear slide mechanism; in other embodiments, the first adjusting screw 114 can be selected not to be set. At this time, the linear module 113 can select a ball screw type linear module or a synchronous belt type linear module, and each limit plate 111 is respectively connected to a different linear module 113, and the movement of the limit plate 111 is controlled by the linear module 113.

[0037] The feed guide rail group 12 includes a first limiting guide rail 121 and a second limiting guide rail 122. The first limiting guide rail 121 and the second limiting guide rail 122 are respectively connected to the two sides of the feed conveying mechanism 11. The material guiding space is formed between the first limiting guide rail 121 and the second limiting guide rail 122. The width of the material guiding space is adjusted synchronously with the conveying width of the feed conveying mechanism 11.

[0038] In detail, in this embodiment, in each group of the feed guide rail group 12, two of the first limit guide rail 121 and the second limit guide rail 122 are provided, and the first limit guide rail 121 and the second limit guide rail 122 are straight guide rails with an L-shaped cross-section, which are respectively connected to one side of the two limit plates 11; the first limit guide rail 121 and the second limit guide rail 122 are arranged opposite to each other, forming a material guide space for workpiece input above the feed conveying mechanism 11, which can ensure that the workpiece falls accurately into the feed conveying mechanism 11.

[0039] In order to control the input frequency of the workpiece, a telescopic blocking mechanism 13 is provided on at least one side of the feed guide rail group 12. The telescopic blocking mechanism 13 includes a telescopic member 131, and the telescopic member 131 is connected to a blocking piece 132. The telescopic blocking mechanism 13 is used to control the workpiece from entering the feed guide rail group 12. When the telescopic blocking mechanism 13 is in a retracted state, the workpiece falls from the material guide space to the feed conveyor mechanism 11. When the telescopic blocking mechanism 13 is in an extended state, the blocking piece 132 blocks the workpiece in the material guide space and prevents the workpiece from falling into the feed conveyor mechanism 11. By controlling the frequency of the extension and retraction of the telescopic blocking mechanism 13, the frequency of the workpiece falling into the feed conveyor mechanism 11 can be controlled, and the frequency of the workpiece passing through the defect detection device 4 can be adjusted. In detail, the telescopic member 131 can be a pneumatic cylinder, an oil cylinder, or an electric push rod.

[0040] One side of the feed guide rail group 12 is provided with an adjustment mechanism 14 for adjusting the length of the guide space, and the adjustment mechanism includes a linear slide rail 141 perpendicular to the conveying direction, and two sliders 142 are slidably connected to the linear slide rail 141. The first limiting guide rail 121 and the second limiting guide rail 122 close to the adjustment mechanism 14 are slidably connected to the linear slide rail 141 through sliders 142 respectively, and the linear slide rail 141 is connected to a connecting plate 143. The two ends of the connecting plate 143 are connected to a support frame 144 respectively through a connecting rod 145. The connecting rod 145 is connected to the connecting rod 145. The connecting plate 143 is threadedly connected, and a first pulley 146 is installed on the two connecting rods 145. A belt 147 is wound between the two first pulleys 146. One of the connecting rods 145 is connected to a driving handwheel 148, and the connecting rod 145 is preferably a screw structure; rotating the driving handwheel 148 causes one of the connecting rods 145 to rotate, and then the other connecting rod 145 rotates through the belt 147, and the connecting plate 143 drives the first limiting guide rail 121 and the second limiting guide rail 122 to move, thereby increasing or shortening the length of the material guide space.

[0041] When there is one feed guide rail group 12, only one connecting plate 143 in the adjustment mechanism 14 may be provided. In order to better improve the input speed of the workpiece, the feed guide rail group 12 may be provided with at least two groups, and the adjustment mechanism 14 is provided between two adjacent feed guide rail groups 12. In order to improve the adjustment efficiency of each feed guide rail group 12, in this embodiment, the adjustment mechanism includes two parallel connecting plates 143, and the outer sides of the two connecting plates 143 are provided with the linear slide rails 141. The two linear slide rails 141 are respectively connected to the first limiting guide rail 121 and the second limiting guide rail 122 of the two adjacent feed guide rail groups 1 through sliders 142. The two feed guide rail groups 12 can be adjusted simultaneously through one set of the adjustment mechanism 14.

[0042] Furthermore, the support frame 144 is provided with a chute, which runs parallel to the conveying direction. The connecting plate 143 is slidably connected to the chute via a limit slide bar. A photoelectric sensor 6 is located below the feed rail assembly 12. At least one of the feed rail 1, conveyor mechanism 3, and discharge rail 5 is equipped with a material sensor 7. The photoelectric sensor 6 detects whether a workpiece has entered the feed rail assembly 12, facilitating the operation of the telescopic material stop mechanism 13. The material sensor 7 detects whether a workpiece has passed through, facilitating the smooth progress of the next step.

[0043] The conveying mechanism 3 includes a first conveyor belt mechanism 31 and a detection station 32. Front guide plates 311 are symmetrically provided on both sides of the feed end of the first conveyor belt mechanism 31. The distance between the two front guide plates 311 and the width of the detection station 32 are synchronously adjusted by the width adjustment mechanism 33. The width adjustment mechanism 33 includes a first screw slide module 331, on which two slides are movably installed, and the two front end guide plates 311 are respectively connected to the slides, and the two ends of the screw of the first screw slide module 331 are respectively connected to the second screw slide module 333 through a transmission mechanism 332, and the two second screw slide modules 333 are connected to both sides of the detection station 32, and a light-transmitting plate 321 is provided in the detection station 32, and both sides of the light-transmitting plate 321 are movably connected to the limited connection seat 322, and the two limited connection seats 322 are respectively connected to the slides of the two second screw slide modules 333, and when the first screw slide module 331 drives the front end guide plate 311 to move, the second screw slide module 333 is driven synchronously by the transmission mechanism 332, so that the distance between the two limited connection seats is reduced or increased. The first screw slide module 331 and the second screw slide module 333 are ball screw type linear modules.

[0044] The transmission mechanism 332 includes a rotating shaft 3321 mounted on the first conveyor belt mechanism 31. The ends of the rotating shaft 3321 are connected to the ends of the screw of the first screw slide module 331 via a belt transmission mechanism or a chain transmission mechanism. The ends of the rotating shaft 3321 are connected to the ends of the screw of the second screw slide module 333 via a belt transmission mechanism or a chain transmission mechanism. The screws of the first screw slide module 331 and the second screw slide module 333 are connected to rotating handwheels or drive mechanisms.

[0045] The first conveyor belt mechanism 31 is hinged with a rotating block 3322 on both sides, and the rotating block 3322 is connected to a mounting shaft 3323. The end of the mounting shaft 3323 is connected to a tensioning wheel 3324 for tensioning the belt transmission mechanism or chain transmission mechanism. The tensioning wheel 3324 keeps the transmission belt or transmission chain in a taut state.

[0046] The limiting connecting seat includes a support seat 3221 connected to the slide of the second screw slide module 333, and the support seat 3221 is connected to a clamping plate 3222 for clamping the end of the light-transmitting plate 321. The end of the light-transmitting plate 321 is inserted between the clamping plate 3222 and the slide of the second screw slide module 333. The second screw slide module 333 can drive the support seat 3221 and the clamping plate 3222 to move, thereby increasing or reducing the light-transmitting area of ​​the light-transmitting plate 321, and when the workpiece passes through the light-transmitting plate 321, the two clamping plates 3222 can be limited on both sides of the workpiece to ensure accurate positioning of the workpiece and improve detection accuracy.

[0047] Furthermore, in this embodiment, a second conveyor belt mechanism 34 may be connected to the side of the position-limiting connection seat away from the first conveyor belt mechanism 31. The structure and composition of the second conveyor belt mechanism 34 are the same as those of the first conveyor belt mechanism 31. An automatic rejection device is provided at the output end of the second conveyor belt mechanism 34. The automatic rejection device can reject unqualified workpieces that have been transmitted out, and qualified workpieces will be output to the discharge guide rail 5 through the automatic rejection device.

[0048] The second screw slide module 333 includes a ball screw 3333, a fixed plate, a sliding rod, a slide, a first fixed block 3331 and a second fixed block 3332. Sliding rods are arranged parallel to both sides of the ball screw 3333. The ball screw 3333 and the slide are connected to the fixed plate through the first fixed block 3331. The ball screw 3333 and the outer end of the slide are connected to the fixed plate. The ball screw 3333 and the inner end of the slide are connected to the slide. The ball screw 3333 passes through the fixed plate and is connected to the first screw slide module 33 through the belt transmission mechanism or the chain transmission mechanism. The first fixed block 3331 and the second fixed block 3332 are fixedly connected to the first conveyor belt mechanism 31 and the second conveyor belt mechanism 34. The slide is movably arranged at the upper end of the second fixed block 3332, and the end of the light-transmitting plate 321 is inserted between the slide and the pressure plate 3222.

[0049] The discharging guide rail 5 includes a discharging conveying mechanism 51 with adjustable width and a lifting bracket 52 arranged at the output end of the discharging conveying mechanism 51. The structural principle of the discharging conveying mechanism 51 is the same as that of the feeding conveying mechanism 11. The lifting bracket 52 passes through the output conveying mechanism 53. The workpiece is output through the discharging conveying mechanism 51 and stacked on the lifting bracket 52. When the workpiece carried on the lifting bracket 52 reaches a preset number, the lifting bracket 52 transfers the stacked workpiece to the output conveying mechanism 53, and the output conveying mechanism 53 outputs it. The output conveying mechanism 53 is preferably a transmission belt mechanism. The lifting and lowering of the lifting bracket 52 can be controlled by a mechanism that can achieve lifting and lowering, such as a pneumatic cylinder, an oil cylinder, an electric push rod, or a linear module.

[0050] The workpiece can be a lead frame, a circuit board, a control core board, a display screen or a lens. The lead frame can be a semiconductor lead frame such as TO, DIP, ZIP, SIP, SOP, SSOP, QFP (QFJ), SOD, SOT, etc., or it can be an LED lead frame, IC lead frame, etc., which will not be listed one by one.

[0051] A paper separation mechanism 8 is provided on one side of the lifting bracket 52, and the paper separation mechanism 8 includes a paper roll supply shaft 81 and a paper supply rack 85. A traction roller group 83 is provided on one side of the paper roll supply shaft 81 for the passage of the separation paper. A tensioning roller shaft 82 for tensioning the separation paper is provided between the traction roller group 83 and the paper roll supply shaft 81. The traction roller group 83 consists of two roller shafts fitted together up and down, one of which is connected to a driving motor. The traction roller group 83 and the tensioning roller shaft 82 are mounted on a base 87, and the base 87 is mounted on the paper supply rack 85 through a movable mechanism 88. A paper outlet slot 84 is provided on one side of the traction roller group 83, and a telescopic cutter 86 is provided on one side of the paper outlet slot 84. The telescopic cutter 86 consists of a blade and a telescopic cylinder. The cylinder rod of the telescopic cylinder is connected to the blade, and the blade is driven to move by the telescopic cylinder so that the blade cuts the separation paper. The movable mechanism 88 may be a linear guide mechanism, a ball screw linear module, a synchronous belt linear module, or other mechanism capable of driving the base 87 to move. The movable mechanism 88 can be used to adjust the distance between the paper outlet slot 84 and the lifting bracket 52, ensuring that the separator paper can be delivered to the lifting bracket 52 through the paper outlet slot 84. During operation, the separator paper is output through the paper roll supply shaft 81, wound around the tensioning roller 82, and passed between the two rollers of the traction roller group 83. Under the traction of the traction roller group 83, it is output from the paper outlet slot 84 to the top of the lifting bracket 52 and covers the workpiece. The retractable cutter 86 cuts the separator paper, and the operation is carried out in sequence to cover each workpiece with separator paper.

[0052] To sum up, the conveying width of the feed conveying guide rail of the lead frame detection equipment of the present application is adjustable, and the length and width of the guide space of the feed guide rail group are adjustable, which can be suitable for the input of workpieces of different sizes and specifications, greatly improving the versatility of the equipment. The workpiece can be accurately input into the feed conveying mechanism through the feed guide rail group, which can ensure the accuracy of the detection position; the width of the guide space of the feed guide rail group and the width of the feed conveying mechanism are adjusted synchronously, and the distance between the two front end guide plates and the width of the detection station are adjusted synchronously, which can improve the accuracy of the transmission space adjustment, reduce the tedious steps of multiple adjustments, greatly improve the working efficiency, and meet the actual requirements of modern industrial production.

[0053] The above description further details the invention in conjunction with specific preferred embodiments, and the specific implementation of the invention should not be considered to be limited to these descriptions. A person skilled in the art of the invention may make several simple deductions or substitutions without departing from the inventive concept, and all of these should be considered to fall within the scope of protection of the invention.

Claims

1. A lead frame inspection device, comprising a feed conveyor rail (1), a frame (2), a conveying mechanism (3), a defect detection device (4) and a discharge rail (5), characterized in that: The conveying width of the feed conveying guide rail (1) is adjustable. The feed conveying guide rail (1) includes a feed conveying mechanism (11) and at least one feed guide rail group (12). The length and width of the guide space of the feed guide rail group (12) are adjustable. The conveying mechanism (3) includes a first conveyor belt mechanism (31) and a detection station (32). Front guide plates (311) are symmetrically provided on both sides of the feed end of the first conveyor belt mechanism (31). The distance between the two front guide plates (311) and the width of the detection station (32) are synchronously adjusted by a width adjustment mechanism (33). The width adjustment mechanism (33) includes a first screw slide module (331). Two movably mounted on the first screw slide module (331) are provided. The two front guide plates (311) are respectively connected to the slides, the two ends of the screw of the first screw slide module (331) are respectively connected to the second screw slide module (333) through a transmission mechanism (332), and the two second screw slide modules (333) are connected to both sides of the detection station (32). A light-transmitting plate (321) is provided in the detection station (32), and both sides of the light-transmitting plate (321) are movably connected to a limited connection seat (322). The two limited connection seats (322) are respectively connected to the slides of the two second screw slide modules (333). The limited connection seat includes a support seat (3221) connected to the slide of the second screw slide module (333). The support seat (322 1) is connected with a pressing plate (3222) for pressing the end of the light-transmitting plate (321), and the end of the light-transmitting plate (321) is inserted between the pressing plate (3222) and the slide of the second screw slide module (333). The defect detection device (4) adopts dual light source detection. During the detection, the workpiece passes through the feed guide rail group (12) to reach the feed conveying mechanism (11), and enters the conveying mechanism (3) under the transmission of the feed conveying mechanism (11). When the conveying mechanism (3) conveys the workpiece, the defect detection device (4) first uses a CCD detection device with a white light light source to detect the workpiece, and then uses a CCD detection device with a blue light light source to perform a secondary detection on the workpiece. The discharge guide rail (5) outputs a qualified workpiece; the transmission mechanism (332) includes a rotating shaft (3321) installed on the first conveyor belt mechanism (31), the two ends of the rotating shaft (3321) are connected to the two ends of the screw of the first screw slide module (331) respectively through a belt transmission mechanism or a chain transmission mechanism, the two ends of the rotating shaft (3321) are connected to the two ends of the screw of the second screw slide module (333) respectively through a belt transmission mechanism or a chain transmission mechanism, and the first conveyor belt mechanism (31) is hinged with a rotating block (3322) on both sides, the rotating block (3322) is connected to a mounting shaft (3323), and the end of the mounting shaft (3323) is connected to a tensioning wheel (3324) for tensioning the belt transmission mechanism or the chain transmission mechanism.

2. The lead frame detection device according to claim 1, characterized in that: The feeding conveying mechanism (11) comprises two symmetrically arranged limiting plates (111), and a conveyor belt mechanism (112) is installed on opposite sides of the two limiting plates (111). The bottom of each limiting plate (111) is connected to a linear module (113) perpendicular to the conveying direction.

3. The lead frame detection device according to claim 2, characterized in that: The two limit plates (111) are connected to the first adjusting screw (114). When the first adjusting screw (114) rotates, the two limit plates (111) move relatively closer to or farther away from each other along the linear direction of the linear module (113).

4. The lead frame detection device according to claim 1, characterized in that: The feed guide rail group (12) comprises a first limiting guide rail (121) and a second limiting guide rail (122), the first limiting guide rail (121) and the second limiting guide rail (122) being respectively connected to both sides of the feed conveying mechanism (11), a material guiding space being formed between the first limiting guide rail (121) and the second limiting guide rail (122), and the width of the material guiding space being adjusted synchronously with the conveying width adjustment of the feed conveying mechanism (11).

5. The lead frame detection device according to claim 4, characterized in that: An adjustment mechanism (14) for adjusting the length of the material guide space is provided on one side of the feed guide rail group (12), the adjustment mechanism comprising a linear slide rail (141) perpendicular to the conveying direction, two sliders (142) being slidably connected to the linear slide rail (141), and the first limiting guide rail (121) and the second limiting guide rail (122) close to the adjustment mechanism (14) are slidably connected to the linear slide rail (141) via sliders (142).

6. The lead frame detection device according to claim 5, characterized in that: The adjustment mechanism (14) includes a connecting plate (143) connected to the linear slide rail (12), and the two ends of the connecting plate (143) are connected to a support frame (144) through a connecting rod (145). The connecting rod (145) is threadedly connected to the connecting plate (143), and a first pulley (146) is installed on the two connecting rods (145). A belt (147) is wound between the two first pulleys (146), and one of the connecting rods (145) is connected to a driving handwheel (148).

7. The lead frame detection device according to claim 1, characterized in that: When the first screw slide module (331) drives the front guide plate (311) to move, the second screw slide module (333) is driven synchronously by the transmission mechanism (332), so that the distance between the two limit connection seats is reduced or increased.

8. The lead frame detection device according to claim 1, characterized in that: The discharge guide rail (5) comprises a discharge conveying mechanism (51) with adjustable width and a lifting bracket (52) arranged at the output end of the discharge conveying mechanism (51); the lifting bracket (52) passes through the output conveying mechanism (53); the workpiece is output through the discharge conveying mechanism (51) and then stacked on the lifting bracket (52); the lifting bracket (52) is used to transfer the stacked workpiece to the output conveying mechanism (53).

9. The lead frame detection device according to claim 1, characterized in that: A photoelectric sensor (6) is provided below the feed guide rail group (12), and at least one of the feed conveying guide rail (1), the conveying mechanism (3), and the discharge guide rail (5) is provided with a material sensor (7).

10. The lead frame detection device according to claim 1, characterized in that: At least one side of the feed guide rail group (12) is provided with a telescopic blocking mechanism (13), the telescopic blocking mechanism (13) comprising a telescopic member (131), the telescopic member (131) being connected to a blocking piece (132), and the telescopic blocking mechanism (13) being used to control the workpiece to enter the feed guide rail group (12).

11. The lead frame detection device according to claim 1, characterized in that: The workpiece is one or more of the following: a lead frame, a circuit board, a control core board, a display screen, and a lens.

12. The lead frame detection device according to claim 1, characterized in that: The invention also includes a paper separation mechanism (8), wherein the paper separation mechanism (8) includes a paper roll supply shaft (81) and a paper supply rack (85), a traction roller group (83) for the separation paper to pass through is provided on one side of the paper roll supply shaft (81), a tensioning roller shaft (82) for tensioning the separation paper is provided between the traction roller group (83) and the paper roll supply shaft (81), the traction roller group (83) and the tensioning roller shaft (82) are mounted on a base (87), and the base (87) is mounted on the paper supply rack (85) through a movable mechanism (88), a paper outlet slot (84) is provided on one side of the traction roller group (83), and a retractable cutter (86) is provided on one side of the paper outlet slot (84), and the retractable cutter (86) is used to cut the separation paper.

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